package com.luzhikun.java2;

import com.luzhikun.java1.Person;
import org.junit.Test;

import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

/**
 * @author shkstart
 * @create 2021-03-04 15:49
 */
public class OtherTest {
    /*
     *
     * 获取构造器结构
     *
     * */
    @Test
    public void test1() {
        Class clazz = Person.class;
        //getConstructors（）：能获得当前运行时类中声明为public的构造器
        Constructor[] declaredConstructors = clazz.getConstructors();
        for (Constructor d : declaredConstructors) {
            System.out.println(d);
        }
        //getDeclaredConstructors():获取当前运行时类所有的构造器
        Constructor[] declaredConstructors1 = clazz.getDeclaredConstructors();
        for (Constructor constructor : declaredConstructors1) {
            System.out.println(constructor);

        }
    }

    /*
     * 获取运行时类的父类
     * */
    @Test
    public void test2() {
        Class clazz = Person.class;
        Class superclass = clazz.getSuperclass();

        System.out.println(superclass);

    }

    /*
     * 获取运行时类带泛型的父类
     * */
    @Test
    public void test3() {
        Class clazz = Person.class;
        Type genericSuperclass = clazz.getGenericSuperclass();
        System.out.println(genericSuperclass);

    }

    /*
     * 获取运行时类带泛型的父类的泛型
     * */
    @Test
    public void test4() {
        Class clazz = Person.class;
        Type genericSuperclass = clazz.getGenericSuperclass();
        ParameterizedType parameterizedType = (ParameterizedType) genericSuperclass;
        //获取泛型类型
        Type[] actualTypeArguments = parameterizedType.getActualTypeArguments();
//        System.out.println(actualTypeArguments[0].getTypeName());
        System.out.println(((Class) actualTypeArguments[0]).getTypeName());

    }

    /*
     * 获取运行时类的接口
     * */
    @Test
    public void test5() {
        Class clazz = null;
        try {
            clazz = Class.forName("com.luzhikun.java1.Person");
            Class[] interfaces = clazz.getInterfaces();
            for (Class c : interfaces
            ) {
                System.out.println(c);

            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        //获取其父类的接口
        Class[] interfaces = clazz.getSuperclass().getInterfaces();
        for (Class s : interfaces
        ) {
            System.out.println(s);
        }
    }

    /*
     *
     * 获取运行时类的包
     * */
    @Test
    public void test6() {
        Class cla = Person.class;
        Package aPackage = cla.getPackage();

        System.out.println(aPackage);

    }

    /*
     *
     * 获取运行时类的注解
     * */
    @Test
    public void test7() {
        Class cla = Person.class;
        Annotation[] annotations = cla.getAnnotations();
        for (Annotation a : annotations
        ) {
            System.out.println(a);
        }

    }

}
